I've looked through the whole web but couldn't find anything !
sources.list but the server is tuck to nginx 1.2 , I don't know what to do please help
You should add wheezy-backports to your /etc/apt/sources.list:
deb http://ftp.de.debian.org/debian/ wheezy-backports main contrib non-free
and then on a console:
aptitude update aptitude -t wheezy-backports install nginx